期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 31, 期 11, 页码 3439-3451出版社
ELSEVIER
DOI: 10.1016/S1003-6326(21)65741-21003
关键词
titanium aluminum alloy; anodization; high temperature oxidation; tribological properties
资金
- National Natural Science Foundation of China [51971205]
- Guangdong Basic and Applied Basic Research Foundation, China [2021B1515020056]
- Shenzhen Fundamental Research Program, China [JCYJ20190807154005593]
The anodized Ti45Al8.5Nb alloy showed good resistance against oxidation at high temperatures, with hardness and elastic modulus changing with prolonged thermal exposure due to the generation of Al2O3-enriched outermost oxide layer.
The oxidation performance and tribological properties of the anodized Ti45Al8.5Nb were investigated. Anodization was performed in ethylene glycol containing 0.15 mol/L NH4F. Results showed that the anodized Ti45Al8.5Nb alloy exhibited good resistance against oxidation. After 100 h oxidation at 1000 degrees C, the mass gain of the anodized Ti45Al8.5Nb alloy was only 0.37 mg/cm(2). This is attributed to the generation of protective oxide scale. On the other hand, the hardness and elastic modulus of the anodized Ti45Al8.5Nb alloy decreased and then increased with the prolonging of thermal exposure due to the generation of the Al2O3-enriched outermost oxide layer.
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